Window-ventilator.



No. 647,572. 4 Patented Apr. 17, woo;

H. A. MILLER. WINDOW VENTILATOR.

(Application filed Nov. 24, 1899.)

(No Model.)

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HENRY A. MILLER, OF IIOAGLAND, INDTANA.

WINDOW-VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 647,572, dated April 1'7, [900.

Application filed November 24,1899. Serial No. 738,186. (No model.)

To aZZ whont it may concern.-

Be it known that I, HENRY A. MILLER, a citizen of the United States, residing at Hoagland, in the county of Allen and State of Indiana, have invented new and useful Improvements in \Vin(low-Ventilators, of which the following is a specification.

Myinvention relates to an improvement in window-ventilators.

It is the object of my invention to provide an improved extensible ventilator which may readily be applied to a window of any width, which will permit the ready ingress to the room of fresh air and escape therefrom of heated or impure air without causing a direct draft of air in the room, and which will provide for the free escape of water from the device to the outside of the window during a rain.

To this end my invention consistsot' a ventilatorhaving the novel features ofconstruction hereinafter described.

To enable others to understand my invention, I have illustrated the same in the accompanying drawings, in which-- Figure 1 is an inside view of a window provided with my improved ventilator. Fig. 2 is a horizontal section taken longitudinally through the ventilator. Fig. 3 is a sectional perspective view, from the outside, of a window with my ventilator shown in place; and Fig. et is a transverse vertical section of the same.

Referring to the drawings, the numeral 1 indicates the upper sash of a window, between the top of which and the window-casing my improved ventilator is designed to be removably applied. Said ventilator comprises two' telescoping sections 2 3, respectively, each of which is provided on opposite sides and near opposite edges with two rows of perforations, (indicated, respectively, by the numerals 4 5 and 6 7.) Each of the sections 2 3 is in the form of a hollow rectangular casing and may be made of heavy block-tin, galvanized iron, or the like, one of the sections being large enough to permit the other section to telescope therein, as shown, so as to permit the device to be adjusted in length to extend from side to side of the window to which it maybe applied. In practice the ventilator would be about an inch and a quarter thick and from six to eight inches in height. The perforations would be about a half an inch in diameter. The lower row 7 of perforations on the outer side of the device extend along the ex trenie bottom edge, as shown, so that during a rain any water which may be driven through the perforations may at once escape and run down the outside of the window. It will be seen that two rows of perforations are provided on the lower outer side of the device and two similar rows on the top inner side. By this construction when the ventilator is in place the fresh air from the outside will pass through the lowermost row 7 of perforations, be deflected inward, and pass into the room through the lower row 5 of the perforations on the inner side, while the heated air will pass from the room through the upper row 4 of perforations, be deflected downward, and pass out through the upper row 6 of perforations on the outer side of the device, the principle which insures such currents of air being that heated air rises, while cold air descends. Thus a continuous circulation of air in the room is insured, the counter-currents preventing a direct draft. The correspond ing rows of apertures in the respective sections are of course made in alinement.

It will be evident that my ventilator may be applied equally well beneath the lower sash of the window, although it is believed that the best results will be obtained by placing it above the upper sash.

It will be seen that my device can readily be placed in or removed from a window, that it is simple in construction, and as each section can be made from a single piece or sheet of metal that it will be economical to manufacture. It will also be obvious that when used in connection with a stationary window, in which case the ventilator would not ordinarily be removable and there would be no occasion for adjusting it, said ventilator could be constructed in one continuous piece instead of two telescoping sections without dcparting from the spirit of my invention.

Having thus fully described my invention, what I claim is The combination with a window frame and sash, of a ventilator consisting of a rectangular hollow casing formed in two telescoping sections, and closed on all sides save that the ICO inner and outer walls are provided With permy hand in presence of two subscribing Witforations along the upper edge of the inner nesses.

wall and the lower edge of the outer Well, said 1 casing being insertible between the end of a HENRY MILLER 5 sash and one end of the Window-frame, sub- WVitnesses:

stantially as described. J. O. GRANDSTAFF,

In testimony whereof I have hereunto set W. WV. FULTON. 

